Question

A motorcycle stunt rider plans to start from one end of a
railroad flatcar, accelerate toward the other end of the car, and
jump from the flatcar to a platform. The motorcycle and rider have
a mass of 303 kg and a length of 2.21 m. The flatcar has a mass of
1870 kg and a length of 20.1 m. Assume that there is negligible
friction between the flatcar's wheels and the rails and that the
motorcycle and rider can move through the air with negligible
resistance. The flatcar is initially touching the platform. The
promoters of the event have asked you how far the flatcar will be
from the platform when the stunt rider reaches the end of the
flatcar. What is your answer?